Web cutting and rewinding machine



May 16, 1939.

w. KOHLER r 2,158,286 WEB CUTTING AND REWIN DING MACHINE Filed Nov. 20, 19s7 s Sheets-Sheet 1- Attorney May 16, 1939. w, KUHLER WEB 0mm AND REWINDING MACHINE Filed Nov. 20, 19s"! 3 Sheets-Sheet 2 May 16, 1939. "w. KCHLER WEB CUTTING AND REWINDING MACHINE Fi led Nov. 20, 1937 SSheets-Sheei 5 Inventor: v

M'lhelm/fbfi/er Attorney Patented May 16, 1939 PATENT" oFFicE amazes was corms AND aawmomc momma Wilhelm Kiihler, Darmstadt, cent A ktien-Geseliachaft,

to Goebe'l Germany any, assignmnarmstadt.

Applicatiiilrl November 20, 1937, Serial No. 175,578

My invention in its broad aspects deals with various problems in the art of re-winding flat material in the form of continuous webs; .the invention relates more particularly to structural o improvements in web re-winding machines of the type, wherein the webusually after having been longitudinally cut or slit into a number of strips. by cutting meansis passed around a deflecting roll arranged in the upper portion of the main chine frame closely to said cutting means, and is then rewound on a rotary winding shaft or tube arranged underneath said deflecting roll and forming the core of the rewound coil or coils.

With machines of this type briefly called hereinafter re-winding machines the deflecting roll and the cutting means cooperatively associated therewith are generally slidably mounted in the upper portion of the machine frame in such manner, that they can move. upwardly from their lowermost position in accordance with the growing diameter of the rewound coil or coils upon which the deflecting roll rests; as a rule the winding shaft is likewise slidably mounted in the machine frame, while the lowermost rolls provided underneath the rewoundfioils for supporting and positively rotating the latter have stationary bearings and remain in a fixed position..

Asa'matter 'of fact known to experts in this field, the point where the rewound material leaves the deflecting roll is the most convenient and appropriate place for visibly supervising the working of the machine, namely, for controlling the proper tensioning of the individual strips, into which the web has been cut, for ascertaining whether the strips in transit have been cleanly separated from eachother and making sure that they are accurately wound up without folding, creasing, wrinkling or overlapping each other at their opposed edges.

40 A draw-back inherent to re-winding of the type described and known to practitioners in this field consists in that the visual supervision of the working of the machine is greatlyimpeded by the shifting of the deflecting roll and of the 4 cutting meansassociated therewith.

Another serious drawback attached to re-winding machines of the type described consists in v that in consequence of the growing weight of the rewound coils resting upon the driving and supporting ro s the pressure imder which the individual laye of material are rewound and assembled upon each other constantly grows from the center towards the periphery of the finished coil; as the result of excessive pressure under which the outer layers of the material engage erably arranged at a heightwhere'it can be com- November 23, 1936 10 Claims. (61. 242-66) each other; wrinkles and furrows will often be produced more especially in the case of coils of paper or other hygroscopic material rewound on machines of the type described.

To wit: Coils of rewound flat material of hy- 5 I which the layers of the material are rewound and-engage each other over the whole width of the coil as explained above their hygroscopic expansion in lateral direction is preventedwith 15 the result that the expansion occurs within the coil proper and that furrows and wrinkles of a. permanent and lasting character are produced therein, which are very objectionable and greatly impair the value of .the rewound material. 20

The principaiobject of this invention is to overcome the above described drawbacks by providing an-improved re-winding machine of the type set forth and of relatively simple-construction. 25

One of the salient features of the invention consists in that the deflecting roll, over which the material under treatment passes to the winding shaft, remains in a fixed position being'preffortably inspected by the operator.

Another equally important feature of the invention consists in that the winding shaft arranged unde eath the defl ting roll and the rollers provided for rotating and supporting the rewound coil are free to downwardly recede as the rewound coil grows larger in diameter.

Other objects aimed at by the invention and advantages obtained will become incidentally apparent to practitioners in this field as the description. proceeds.

The nature and. scope of this invention are briefly outlinedin the appended claims and will be more fully understood from the following specification taken together with the accompanying drawings, in which Fig. 1 is a rout elevation-partly in sectionof a slitting and re-winding machine desisnedaccording to this invention and shown by way of 50 an example;

Fig. 2 is a side elevation of the machine;

Fig. 4 is an enlarged fragmentary section of u.

the machine horizontally taken on line IVIV in Fig. 1;

Fig. 5 is a fragmentary sideelevation made in a smaller scale and diagrammatically showing a structurally modified re-winding machine designed according to this invention;

Fig. 6 is a fragmentary front elevation of the I machine shown inFig. 5.

The rewinding machine re-designed with the objects in view stated above and shown by way of an example in Figs. 1 to 4 comprises:

(1) A machine frame comprising a bed plate It! and two upright standards II, II mounted thereon; in the latter guide slots l2, l2 are formed in symmetric disposition relatively to the median plane of symmetry vertically intersecting the machine;

(2) A rotary shaft 7 carrying the supply roll 8, which is removably mounted at the back portion of the machine frame, its preferred location being shown in Figs. 2 and 3,

'(3) Guide rolls i3, i4 journalled in the upper section of the machine frame, over which the web W tobe slit and rewound passes to rotary cutting disks i5 and to a grooved roller iii of conventional design cooperating therewith, and thence to the deflecting roll II; the latter is positively rotated by means of bevel gear wheels I8, l8 and is according to this invention stationarily mounted in the upper portion of the machine frame, preferably at a hight, where it can be comfortably inspected by the operator of the machine; a train of gear wheels I9, I 9', l9" being provided for rotating the cutting roller I6 and disks i5 jointly with the deflecting roll H,

(4) A winding shaft 20 carrying the rewound coil 9, which according to this invention is slidably mounted in the machine frame underneath the deflecting roll I! soas to be capable of descending in response to the growing diameter of the rewound coil 9; the winding shaft is remov- K ably journalled at both ends in the openbearings 2| of primary guide blocks22, 22, which slidingly engage said guide slots l2, I2, and are rigidly connected with each other by crossbeams (not shown) so as to form a structural unit,

(5) Means for suporting and positively revolving the rewound coil 9, which comprises coil supporting rolls 20, 30 slidingly arranged underneath the winding shaft 20 so as to be capable of descending jointly with the latter as the rewound coil 9 grows larger in diameter; the said coil supporting rolls 30, 30" are journalled in secondary or lower guide blocks 92, 32', which slidingly engage said guide slots l2, l2 and are rigidly connected with each other by crossbeams (not shown) so as to form a structural unit.

Means should be provided for guiding the sup-- porting rolls 39, 90' on descending so as to prevent accidental tilting and ensure a uniform diameter of the rewound coil or coils; said guiding means comprise in the embodiment of the invention shown in Figs. 1-4:

A rotary shaft 34 journalled in said secondary guide blocks 32, 32', a pair of gear wheels 95, 35' keyed on said shaft, and tooth racks l9, l9 fixed at the machine frame in upright position substantially parallel to the guide slots l2, l2 for engagement with said gear wheels .35, 35.

The means for rotating the said coil supporting rolls 9., 39 and in turn positively revolving the rewound coil 9 comprise:

A rotary shaft 49 journalled in the machine framein substantially vertical disposition, which is driven by apair of cog wheelsi4l,.4l' and'a prime mover M, another pair of cog wheels 42, 42, of which wheel 42 is splined on the shaft 40 so as to be capable of ascending and descending thereon, and a train of gear wheels 44, 45, 46 driven by interen gaging said cog wheels 42, 42 and driving the supporting rolls 30, 3,0 in such manner, that the latter are both revolved in the same direction of rotation,

(6) Lifting means for keeping the rewound coil 9 in cooperative engagement with the deflecting roll I! which comprise: Balance weights 50, 50' composed of a number of disks exchangeably assembled upon each other and having ropes 5!, 5! attached, of which the lower ends are secured on the machine frame at 52, 52', said ropes running over fixed pulleys 53, 53' and loose pulleys 54, 54', mounted on the projecting ends of the shaft 34; by the cooperation of the said fixed and loose pulleys the weightsiil, 50 are capable of counterbalancing double their own weight. Their counterbalancing power should in general exceed the total weight of the masses to be lifted including the maximum weight of the finished rewound coil 9 and making an allowance for frictional resistance-except in cases where delicate materials, for instance webs sensitive to pressure such as crepe paper, carbon paper for duplicating purposes, gummed tape or the like are under treatment, as will be explained hereinafter.

It will be noted, that by the provision of said balance weights 50, 50' as lifting means the pressure under which the rewound coil 9 bears against the deflecting roll I! gradually drops in proportion to the growing weight of the rewound coil 9; this is most desirable since the. pressure and the frictional contact under which the individual layers of material of the coil 9 are rewound will decrease towards its outer periphery-as against increasing with machines of known design as used in various trades heretofore.

Supplemental lifting means may be provided for controlling and conveniently re-adjusting the pressure of contact between the rewound coil 9 and the deflecting roll 11; according to this invention said supplemental lifting means which are particularly useful in re-winding delicate materials referred to above comprise:

Extension springs 60, 60', 6|, 6| which are fixed at their upper ends on the machine frame and at their lower ends on the primary guide blocks 22, 22 carrying the winding shaft 20 and the rewound coil 9.

It will be noted, that the lifting power of said springs 69, 60', 6|, 9| on being extended will grow in direct proportion to the length of the descent of the winding shaft 20, namely being commensurate to the increasing diameter and weight of the rewound coil 9,thereby complementing the lifting power of the balance weights 50, in such manner, that (if desired) substantially uniform pressure will prevail at the deflecting roll I I during the whole re-winding operation from start to finish.

Various other changes and modifications may be conveniently made in the structural details of eat with the'toughness, pliability, thickness and 76 arcane other physical properties of the material under treatment and with the size of the flnished coils rewound.

A re-winding machine embodying the salient features of this invention and working according to the direct winding principle is shown by way of another example in Figs. and 6, namely comprising: i

(1) A machine frame IIO, II I on the back po tion of which the supply roll I0 is accommodated, and wherein guide slots H2 are formed; in the upper section of the machine frame guiding rolls (not shown), rotary cutting disks H5, a grooved roller IIG cooperating therewith, and a deflecting roll II! are journalled,

' (2) A winding shaft I carrying the rewound coil 90-and being journalled in guide blocks I22, which slidingly engage the said guide slots 2-, the winding shaft I20 is rotated by apair of bevel gear wheels I42, I42, of which wheel I42 is splined on the rotary shaft I40 so as to be capable of ascending and descending jointly with the winding shaft I20,

(3) Means for uniformly guiding the winding shaft I20- and preventing tilting thereof on descending, which comprise a rotary shaft I34 journalled in said guide blocks I22 and having gear -wheels I35 keyed thereon, which engage tooth racks I36 fixed in upright position on the machine frame,

V (4) Lifting means for keeping the rewound coil 90 in frictional engagement with the deflecting roll II I, thereby positively rotating the latter and in turn revolving the cutting rollers interengaged by gear wheels H9, H9, H9"; said lifting means are substantially identical as to their operation to those described with reference to Figs. 1 to 4, and comprise balance weights I having ropes I5I attached, which run over fixed pulleys I53 and loose pulleys I54, the lat- .ter being free to rotate on the of shaft I34. I

Extension springs I60, I may lie-likewise conveniently provided as additional or complementary lifting means and with the same objects in view described above with reference to the machine shown in Figs. 1 to 4.

What I claim is:

1. Re-wlnding machine of the type set forth comprising a machine frame, a deflecting roll stationarily mounted therein, a winding shaft the rewound coil, and lifting means for keeping the latter in cooperative engagement with the a said deflecting roll.

2. Re-winding machine of the type set forth comprising amachine frame, a deflecting roll stationarily mounted therein, a winding shaft carrying. the rewound coil and slidably mounted in the machine frame underneath the deflecting roll so as to downwardly recede as the rewound coil grows larger in diameter, means for revolving the rewound coil and lifting means for keeping the latter in cooperative engagement with the said deflecting roll, said revolving means comprising coil supporting rolls slidably-arranged underneath the winding-shaft so as to downwardly recede jointly with the latter as the coil grows larger in diameter, and means for revolving said supporting rolls; 1

3. Re-winding machine of the type set forth projecting ends comprising a machine frame, a deflecting roll stationarily mounted therein, a winding shaft carrying the rewound coil and slidably mounted in themachine frame underneath the deflecting .roll so as to downwardly recede as the rewound coil grows larger in diameter, means for revolving the rewound coil and lifting means for keeping the latter in cooperative engagement with the said deflecting roll, said revolving means comprising coil supporting rolls slidably arranged underneath the winding shaft so as to down-' wardly recede jointly with the latter as the coil grows larger in diameter, means, for revolving said supporting rolls, and means for guiding the latter on rising' and descending.

4. Re-winding machine of the type set forth comprising a machine frame, a deflecting roll stationarily mounted therein, a winding shaft carrying the rewound coil and slidably mounted in the machine frame underneath the deflecting roll so as to downwardly recede as the rewound coil grows larger in diameter, means for revolving the rewound coil and lifting means for keeping. the latter in cooperative engagement with the said deflecting roll, said revolving means comprising coil supporting -rolls slidably arranged underneath the winding shaft so asto downwardly recede jointly with the latter as the coil grows larger in diameter andmeans for revolving said supporting rolls, said lifting means comprising counterweights and flexible tension members atcarrying the rewound coil and slidably mounted in the machine frame underneath the deflecting roll so as to downwardly recede as the rewound ,coil grows larger in diameter, means for revolving the rewound coil and lifting means for keeping the latter in cooperative engagement with the said deflecting roll, said revolving means comprising coil supporting rolls slidably arranged underneath the winding shaft so as to downwardly recede jointly with the latter as the coil grows larger in diameter and means for revolving said supporting rolls, said lifting means comprising counterweights and flexible tension members attached thereon and engaging said supporting rolls, and extension springs fixed with their upper ends at'the upper section of the machine frame and engaging said winding shaft with their lower ends.

6. Re-winding machine of the type set forth comprising a machine frame, a deflecting roll stationarily mounted therein, a winding shaft carrying the rewound cofl and slidably mounted in the machine frame underneath the deflecting roll so as to downwardly recede as the rewound coil grows larger in diameter, means for revolving the rewound coil and lifting means for keeping the latter in cooperative engagement with the said deflecting roll, said revolving means comprising coil supporting rolls slidably arranged underneath the winding shaft so as to downwardly recede jointly with the latter as the coil grows larger in diameter, means for revolving said supporting rolls, and means for guiding the latter on rising and descending, said guiding means comprising two guide blocks sliding in guideslots, formed on the machine frame in symmetric disposition to each other, and carrying said supporting rolls, a rotary shaft journalled in said guideblocks, gear wheels keyed on said shaft and tooth racks fixed on the machine frame in upright position substantially parallel to said guide slots for engagement with said gear wheels.

'7. Re-winding machine of the type-set forth comprisinga machine frame, a deflecting roll stationarily mounted therein, a winding shaft carrying the rewound coil and slidably mounted in the machine frame underneath the deflecting roll so as to downwardly recede as the rewound coil grows larger in diameter, means for revolving the rewound coil and lifting means for keeping the latter in cooperative engagement with the said deflecting roll, said revolving means comprising coil supporting rolls slidably arranged underneath the winding shaft so as to downwardly recede jointly with the latter as the coil grows larger in diameter and means for revolving said supporting rolls, said latter means for revolving the supporting rolls comprising guide blocks carrying said supporting rolls and sliding in guide slots formed in the machine frame in symmetric disposition to each other, a rotary shaft journalled in the machine frame in upright disposition, a prime mover for rotating said shaft, a primary gear wheel splined thereon so as to be free to ascend and descend in response to the motions of the supporting rolls, and a train of gear wheels cooperatively interengaging said primary gear wheel and-supporting rolls.

8. Re-winding machine of the type set forth comprising a machine frame, a deflecting roll stationarily mounted therein, a winding shaft carrying the rewound coil and slidably mounted in the machine frame underneath the deflecting roll so as to downwardly recede as the rewound coil grows larger in diameter, means for revolving the rewound coil and lifting means for keeping the latter in cooperative engagement with the said deflecting roll, said lifting means comprising 40 counterweights having flexible tension members attached thereon for engaging said winding shaft.

9. Re-winding machine of the type set forth comprising a machine frame, a deflecting roll stationarily mounted therein, a winding shaft carrying the rewound coil and slidably mounted in the machine frame underneath the deflecting roll so as to downwardly recede as the rewound coil grows larger in diameter, means for revolving the rewound coil and lifting means for keeping the latter in cooperative engagement with the said deflecting roll, said lifting means comprising counterweights having flexible tension members attached thereon for engaging said winding shaft, and means for positively and uniformly guiding the winding shaft at both ends on ascending and descending.

10. Re-winding machine of the type set forth comprising a machine frame, a deflecting roll stationarily mounted therein, a winding shaft carrying 'the rewoundcoil and slidably mounted in the machine frame underneath the deflecting roll so as to downwardly recede as the rewound coil grows larger in diameter, means for revolving the rewound coil, lifting means for keeping the latter in cooperative engagement with the said deflecting roll, said lifting means comprising counterweights having flexible tension members attached thereon for engaging said winding shaft,

and means for positively and uniformly guiding the winding shaft at both ends on ascending and descending, said guiding means comprising guide blocks carrying the-winding shaft and sliding in guide slots formed in the machine frame in symmetric disposition to eachother, a rotary shaft journalled in said slide guide blocks, gear wheels keyed to said rotary shaft, and tooth racks fixed on the machine frame in upright disposition substantially parallel to said guide slots for engagement with said gear wheels.

WILHELM KGHLER. 

